Hoisting apparatus



(No Model.) Y J. G. SPEIDEL. Hoisting Apparatus.

Patented April 26.18.81.

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11. PETERS. PNOT0-LITHOGRAPHER WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

JHN GEORGE SPEIDEL, OFVREADING, PENNSYLVANIA.

HOISTING APPARATUS.

SPECIFICATION forming part 0f Letters Patent NO. 240,782, dated April 26, 1881.

Application filed March 19, lBBl. (No model.)

To all whom it may concern Be it known that I, J. GEORGE SPEIDEL, of Reading, in the county of Berks and State of Pennsylvania, have invented a new and useful Improvement in Hoisting Apparatus, of which the following is a specification.

The object of my invention is to provide for lifting variable loads, to insure safety, andto compass those objects by an apparatus of portable nature.

rlhe invention Consists in a block provided lwith differential gearing of novel arrangement,

in safety-stop devices and automatic brake mechanism, acting by weight of load, as more particularly set forth hereinafter with referenceto the accompanying drawings.

In the drawings, Figure l is a side elevation of the apparatus. Fig. 2 is a front view. Fig. 3 is a central vertical section. Fig. 4 is a vertical section on line w .fr of Fig. 3, showing the brake mechanism. Figs. 5, 6, and 7 are detail views of the chain-wheel.

Similar letters of reference indicate corresponding parts.

A is the main shaft of the mechanism, having at its ends chain-wheels a a', on which are endless hand-chains b b. The wheel a is loose on the shaft, and has its hub formed with a pinion, c, and wheel a', which is fast on the shaft, is formed with a rim-fiange and interna-l gear.

d is a secondary shaft carrying fast pinions e c', that mesh with pinions c and wheel a respectively. The shafts A d are sustained in cheek-platesff, which at the upper end are connected by a yoke or bar, g, that is fitted with a hook, h, for suspension of the apparatus. At the lower end the cheek-plates j are connected by a bar, p, on which is hung an eyepiece or ring, fi.

On the shaft A, between the plates f, a chainwheel, k, is keyed, and loose on the shaftare two wheels or disks, Z l, that have their hubs eX- tended through elongated bearings in plates f.

On the shaft l is loosely hung a bent guidepiece, t, that lapsover the chain-wheel and prevents the chain from rising.

The hoisting-chain m passes around wheel k, and its end having the hook k maybe attached to the load, or when double power is required the chain carries the block u, and has its end connected to the ring z'.

The wheels l are the brake-wheels, and are fitted with the devices next described. The wheels lhavetheirfaces next to wheel .k formed with ratchet-teeth, and the wheel k, as shown in Figs. 5, 6, and 7, is provided with four sprin gpawls, o, two on each side, consisting of straight pins set in mortises, with spiral springs behind them, .so that they are projected and engage the ratchets. The rims of the wheels l are formed with V-grooves.

As shown most clearly in Fig. 4, there are two curved toggle-bars, q q, hung on the lower cross-bar, p, beneath each wheel l, and extending around them at opposite sides. The upper ends of each pair of bars are connected by a `right-and-left hand screw-rod, s, to allow of their adjustment, and lthe bars carry 'brake- 'blocks-entering the grooves of the disk l. The brake-blocks are in two portion s-viz., the outer portions, r, that are attached to bars q by bolts passing through slots, as shown in Fig. 2, and the loose V-shaped portions r', placed between the portions r and brake-wheels l. The adj ustments of these parts Vmay be made so that the brake-blocks shall give exactly the pressure required to hold the load suspended from the shaft A.

ln operation the load is raised or lowered by operation of either hand-chain, according to the power required. Thechain on wheel a' gives the greater speed, and with heavy loads may be irst used to tighten the hoisting-chain and the other hand-chain then used. As the chain-wheel la turns in raising the load its pawls pass over the ratchets of wheels l. The load on shaft A is sustained by brake-wheels l, resting on blocks r', which, in turn, are supported by bar p, so that the brake is continuously applied and the chain wheels arrested bythe ratchet devices the moment the hand-chains are left free. In lowering the load the handchains are to'be run backward and the chain- Wheel 7c will then give revolution to the wheels l. The load will thus be at all times under the control of the operator.

It will be seen that with this apparatus four rates of speed are attainable. The apparatus is also safe and portable. It can also be made of comparatively small size and used for heavy loads. The brake-wheels have sufcient holding power, though made of small size, for the- IOO is taken by the brake-blocks at opposite sides of the Wheels. The resistance can be Varied by shifting the blocks to chan ge the angle of resistance. 5 Having thus fully described my invention, I claim as new and desire to secure by Letters 'Patent- 1. In hoisting apparatus, the combination of chain-wheel 7c, hoisting-chain on, chain-Wheels 1o a a', hand-chains b b, main shaft A, countershaftd, intermediate gearing between the handchain Whee1s,and the sustaining-plates f, substantially as shown and described, combined for operation as set forth.

2. In hoisting apparatus, the loose brake- I5 wheels l, formed with ratch et-teeth,chainwhee1 7a, fitted with springpawls o, toggle bars g, brake -blocks i", suspension -plates j', formed with elongated bearings, connecting-harp, and the operating-shaft A, carrying the chain and zo brake Wheels, combined for operation substantially as shown and described.

JOHN GEORGE SPEIDEL.

Witnesses JOHN BLEssiNG, LEVI H. LIESS. 

